US4927311A - Ship unloader with screw conveyor swingable in various planes - Google Patents
Ship unloader with screw conveyor swingable in various planes Download PDFInfo
- Publication number
- US4927311A US4927311A US07/228,662 US22866288A US4927311A US 4927311 A US4927311 A US 4927311A US 22866288 A US22866288 A US 22866288A US 4927311 A US4927311 A US 4927311A
- Authority
- US
- United States
- Prior art keywords
- boom
- conveyer
- swingable
- supporting frame
- unloader
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/60—Loading or unloading ships
- B65G67/606—Loading or unloading ships using devices specially adapted for bulk material
Definitions
- the present invention relates to an unloader suitable for stevedoring cargoes, especially bulk cargoes to be conveyed, from ships.
- the present invention has been accomplished to improve the conventionally known unloaders. It is an object of the present invention to provide an unloader which is capable of operating efficiently and is simple in structure, but which is inexpensive.
- an unloader comprising: a boom; a boom conveyer disposed above the boom in such a manner as to extend in the longitudinal direction of the boom; a screw supporting frame mounted above the head of the boom in such a manner as to be also to pivot about the boom conveyer; and a vertical screw conveyer supported by the screw supporting frame in such a manner as to be swingable within a plane which is substantially parallel with a plane including the axis of rotation of the screw supporting frame.
- FIG. 1 is a side view schematically showing an unloader in accordance with the present invention
- FIGS. 2 and 3 are a side view and a plan view, respectively, showing the structure of the head portion of a boom of the unloader shown in FIG. 1;
- FIG. 4 is a front sectional view taken along the line IV--IV shown in FIG. 2;
- FIG. 5 is a front sectional view taken along the line V--V shown in FIG. 2;
- FIG. 6 is a front sectional view taken along the line VI--VI shown in FIG. 2.
- the swinging mechanism of the screw supporting frame 7 comprises circular-arc rails 7a disposed in engagement with rollers 8 provided at the upper ends of the frame 6, an electric drive motor 9 mounted on the frame 6 for causing swinging, and a circular-arc pinion rack 7b disposed in meshing engagement with a pinion fitted into an end of the shaft of the motor 9.
- the circular-arc rails 7a and the pinion rack 7b form a structure integral with the screw supporting frame 7.
- the virtual center of the circular-arc rails 7a is located in the vicinity of the conveyance surface of the boom conveyer 5.
- the swinging mechanism members 7a and 7b and the swinging cylinder 13a are employed in such a manner as to swing the screw conveyer 12a until the tip of the screw conveyer 12a comes into contact with the cargoes. Thereafter, the unloading operation is continued.
- the vertical screw conveyer suspended from the head of the boom can be swung both within the plane along which the boom is hoisted and in the direction perpendicular to this plane. Accordingly, it is possible to insert the tip of the vertical screw conveyer into a desired location below the deck of the ship, thereby enabling an efficient unloading of part of a cargo which hitherto has not been successfully unloaded.
- the above-described arrangement of the present invention is very effective in increasing the efficiency of unloading operation.
- the structure of the unloader is very simple, and the swinging mechanism can be provided at low costs.
Landscapes
- Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Ship Loading And Unloading (AREA)
Abstract
An unloader having a vertical screw conveyer suspended from the head of the boom for conveying bulk cargoes from a ship, and a boom conveyer disposed above the boom for conveying the cargoes to the ground. The vertical screw conveyer is not only swingable within a plane parallel to the boom-hoisting plane but also able to pivot about the axis of the boom. Thus, this arrangement makes the vertical screw conveyer swingable in two directions. Accordingly, the vertical screw conveyer can reach locations below a hatch both in the transverse direction of the ship and in the longitudinal directions thereof, thereby enhancing the efficiency of unloading operation particularly with respect to these locations which have been out of reach with a conventional unloader.
Description
The present invention relates to an unloader suitable for stevedoring cargoes, especially bulk cargoes to be conveyed, from ships.
In a conventionally known unloader with a vertical screw conveyer, although the screw can swing in the direction parallel with the plane along which the boom is hoisted, it has been unable to swing in the direction perpendicular to the plane and the boom.
However, in cases where cargoes of certain types or in certain conditions are involved, it is desired that the screw be capable of swinging also in the direction perpendicular to the boom, because this would be more convenient and more efficient in such cases.
In order to satisfy the above-stated requirement, an arrangement has been proposed in which the entire boom is adapted to tilt so as to enable the screw to swing in the direction perpendicular to the boom. However, this arrangement requires a complicated tilting mechanism, thereby causing an increase in equipment costs.
The present invention has been accomplished to improve the conventionally known unloaders. It is an object of the present invention to provide an unloader which is capable of operating efficiently and is simple in structure, but which is inexpensive.
To this end, according to the present invention, there is provided an unloader comprising: a boom; a boom conveyer disposed above the boom in such a manner as to extend in the longitudinal direction of the boom; a screw supporting frame mounted above the head of the boom in such a manner as to be also to pivot about the boom conveyer; and a vertical screw conveyer supported by the screw supporting frame in such a manner as to be swingable within a plane which is substantially parallel with a plane including the axis of rotation of the screw supporting frame.
The arrangement, operation, and effect of the present invention will be more apparent from the following description of the preferred embodiment thereof when read in connection with the accompanying drawings.
FIG. 1 is a side view schematically showing an unloader in accordance with the present invention;
FIGS. 2 and 3 are a side view and a plan view, respectively, showing the structure of the head portion of a boom of the unloader shown in FIG. 1;
FIG. 4 is a front sectional view taken along the line IV--IV shown in FIG. 2;
FIG. 5 is a front sectional view taken along the line V--V shown in FIG. 2; and
FIG. 6 is a front sectional view taken along the line VI--VI shown in FIG. 2.
FIGS. 1 to 6 illustrate one preferred embodiment of the present invention. As shown in the drawings, a boom 1 is pivotally mounted on a rotary frame 3 disposed on a movable stock 2 and can be hoisted by a hoisting device 4. A portal-shaped frame 6 is mounted on a head portion of the boom 1 in a saddle-like manner, more specifically in such a manner as to extend across and over a boom conveyer 5. A screw supporting frame 7 having a swinging mechanism, described later, is superposed on the frame 6.
The swinging mechanism of the screw supporting frame 7 comprises circular-arc rails 7a disposed in engagement with rollers 8 provided at the upper ends of the frame 6, an electric drive motor 9 mounted on the frame 6 for causing swinging, and a circular-arc pinion rack 7b disposed in meshing engagement with a pinion fitted into an end of the shaft of the motor 9. The circular-arc rails 7a and the pinion rack 7b form a structure integral with the screw supporting frame 7. The virtual center of the circular-arc rails 7a is located in the vicinity of the conveyance surface of the boom conveyer 5.
A vertical screw conveyer 12a is secured to a mounting frame 10. The frame 10 is swingably supported, via pins 11, by brackets 7c provided on upper portions of the screw supporting frame 7. A scattered commodity discharge port 12a' is provided at an upper end portion of the vertical screw conveyer 12a and is disposed concentrically with the pins 11. The tip of a piston rod of a swinging cylinder 13a is linked to the mounting frame 10. An upper portion and a lower portion of the vertical screw conveyer 12a, mounted on the mounting frame 10, are tightly clamped by mounting pieces 15.
A movable chute 16 is supported by the screw supporting frame 7 and is connected to the discharge port 12a' of the screw conveyer 12a. The movable chute 16 is adapted to tiltingly swing together with the screw supporting frame 7 when it is driven by the electric motor 9.
The unloader in accordance with the present invention has the above-described construction. Next, the operation of the unloader will be described.
When it is necessary to unload bulk cargoes from a hatch of a ship 22, the unloader is moved to a position near the ship 22. The boom 1 is rotated and is vertically moved so as to allow the vertical screw conveyer 12a suspended from the head of the boom 1 to extend into the hatch of the ship, and an operation of unloading the bulk cargoes is performed.
During the unloading operation, when it is necessary to insert the vertical screw conveyer 12a further down into the hatch in the transverse direction of the ship and in the longitudinal direction thereof, the swinging mechanism members 7a and 7b and the swinging cylinder 13a are employed in such a manner as to swing the screw conveyer 12a until the tip of the screw conveyer 12a comes into contact with the cargoes. Thereafter, the unloading operation is continued.
According to the invention, the vertical screw conveyer suspended from the head of the boom can be swung both within the plane along which the boom is hoisted and in the direction perpendicular to this plane. Accordingly, it is possible to insert the tip of the vertical screw conveyer into a desired location below the deck of the ship, thereby enabling an efficient unloading of part of a cargo which hitherto has not been successfully unloaded. Thus, the above-described arrangement of the present invention is very effective in increasing the efficiency of unloading operation. In addition, the structure of the unloader is very simple, and the swinging mechanism can be provided at low costs.
Claims (1)
1. An unloader comprising: a boom having a head end; a boom conveyer disposed above said boom in such a manner as to extend in the longitudinal direction of said boom; a screw supporting frame mounted above the head end of said boom in such a manner as to be able to pivot about a longitudinal axis of said boom conveyor; a vertical screw conveyer supported by said screw supporting frame in such a manner as to be swingable within a plane which is substantially parallel with a plane including the axis of rotation of said screw supporting frame; a portal-shaped frame supported on the head end of said boom in such a manner as to extend across and over said boom conveyer, said portal-shaped frame having upper opposite ends and being provided with rollers at said upper opposite ends; and an electric motor supported above said boom and having a shaft one end of which a pinion is fitted into; said screw supporting frame having circular-arc rails disposed in engagement with said rollers, and a circular-arc rack disposed in parallel with said rails and in meshing engagement with said pinion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-203448 | 1987-08-18 | ||
| JP62203448A JP2514212B2 (en) | 1987-08-18 | 1987-08-18 | Unloader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4927311A true US4927311A (en) | 1990-05-22 |
Family
ID=16474286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07/228,662 Expired - Fee Related US4927311A (en) | 1987-08-18 | 1988-08-05 | Ship unloader with screw conveyor swingable in various planes |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4927311A (en) |
| JP (1) | JP2514212B2 (en) |
| CN (1) | CN1009354B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5078261A (en) * | 1982-09-02 | 1992-01-07 | Miller Formless Co., Inc. | Apparatus and method for unloading bulk materials |
| US5191966A (en) * | 1982-09-02 | 1993-03-09 | Miller Formless Co., Inc. | Apparatus and method for unloading bulk materials |
| US5575603A (en) * | 1994-12-01 | 1996-11-19 | Pwh Anlagen + Systeme Gmbh | Bulk-ship unloading system |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1915770B (en) * | 2006-09-07 | 2010-08-18 | 梁明 | Draper type conveyor |
| CN102085965B (en) * | 2009-12-03 | 2013-06-26 | 中国神华能源股份有限公司 | Feeding system for ship unloader and control method thereof |
| JP5859400B2 (en) * | 2012-08-22 | 2016-02-10 | 住友重機械搬送システム株式会社 | Continuous unloader and control method of continuous unloader |
| CN104071593B (en) * | 2014-06-27 | 2016-06-08 | 冯政 | Hydraulic pressure, pneumatic type tunnel are unloaded machine |
| CN104555495B (en) * | 2015-01-20 | 2016-08-17 | 广州港集团有限公司 | Ship borne type spiral shipment machinery of unloading a ship is transferred system |
| CN105000397A (en) * | 2015-07-27 | 2015-10-28 | 天府重工有限公司 | Closed type vertical screw unloader achieving vertical lifting function |
| JP6955448B2 (en) * | 2018-01-11 | 2021-10-27 | 川崎重工業株式会社 | Material handling machine |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1058306A (en) * | 1912-02-29 | 1913-04-08 | Frederick H Kindl | Unloading apparatus. |
| US3640376A (en) * | 1970-03-12 | 1972-02-08 | Pohlig Heckel Bleichert | Unloader for bulk material in which a chain bucket elevator constitutes the receiving and elevating apparatus |
| US4020953A (en) * | 1975-04-07 | 1977-05-03 | Ab Siwertell | Apparatus for unloading particulate material, especially from ships |
| US4152029A (en) * | 1976-10-01 | 1979-05-01 | Babcock Hydro-Pneumatics Limited | Fluent solid material handling means |
| JPS57114783A (en) * | 1980-12-29 | 1982-07-16 | Hitachi Zosen Corp | Bulk cargo ship |
| JPS5932377A (en) * | 1982-08-12 | 1984-02-21 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
| WO1984002112A1 (en) * | 1982-12-01 | 1984-06-07 | Kaare Haahjem | Apparatus for trimming and emptying bulk material |
| JPS61248826A (en) * | 1985-04-25 | 1986-11-06 | Hitachi Constr Mach Co Ltd | Handling gear |
| US4738578A (en) * | 1985-01-29 | 1988-04-19 | The Csl Group, Inc. | Bulk material reclaiming apparatus |
| US4755094A (en) * | 1986-07-16 | 1988-07-05 | Express Marine, Inc. | Self-unloading barge and unloading apparatus therefor |
-
1987
- 1987-08-18 JP JP62203448A patent/JP2514212B2/en not_active Expired - Lifetime
-
1988
- 1988-08-05 US US07/228,662 patent/US4927311A/en not_active Expired - Fee Related
- 1988-08-17 CN CN88106079A patent/CN1009354B/en not_active Expired
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1058306A (en) * | 1912-02-29 | 1913-04-08 | Frederick H Kindl | Unloading apparatus. |
| US3640376A (en) * | 1970-03-12 | 1972-02-08 | Pohlig Heckel Bleichert | Unloader for bulk material in which a chain bucket elevator constitutes the receiving and elevating apparatus |
| US4020953A (en) * | 1975-04-07 | 1977-05-03 | Ab Siwertell | Apparatus for unloading particulate material, especially from ships |
| US4152029A (en) * | 1976-10-01 | 1979-05-01 | Babcock Hydro-Pneumatics Limited | Fluent solid material handling means |
| JPS57114783A (en) * | 1980-12-29 | 1982-07-16 | Hitachi Zosen Corp | Bulk cargo ship |
| JPS5932377A (en) * | 1982-08-12 | 1984-02-21 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
| WO1984002112A1 (en) * | 1982-12-01 | 1984-06-07 | Kaare Haahjem | Apparatus for trimming and emptying bulk material |
| US4738578A (en) * | 1985-01-29 | 1988-04-19 | The Csl Group, Inc. | Bulk material reclaiming apparatus |
| JPS61248826A (en) * | 1985-04-25 | 1986-11-06 | Hitachi Constr Mach Co Ltd | Handling gear |
| US4755094A (en) * | 1986-07-16 | 1988-07-05 | Express Marine, Inc. | Self-unloading barge and unloading apparatus therefor |
Non-Patent Citations (1)
| Title |
|---|
| The 1986 Loadstar Bulk Handling Directory. * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5078261A (en) * | 1982-09-02 | 1992-01-07 | Miller Formless Co., Inc. | Apparatus and method for unloading bulk materials |
| US5191966A (en) * | 1982-09-02 | 1993-03-09 | Miller Formless Co., Inc. | Apparatus and method for unloading bulk materials |
| US5575603A (en) * | 1994-12-01 | 1996-11-19 | Pwh Anlagen + Systeme Gmbh | Bulk-ship unloading system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1009354B (en) | 1990-08-29 |
| JPS6448725A (en) | 1989-02-23 |
| CN1031817A (en) | 1989-03-22 |
| JP2514212B2 (en) | 1996-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: SUMITOMO HEAVY INDUSTRIES, LTD., 2-1, 2-CHOME, OHT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KADA, YOSHIO;REEL/FRAME:004916/0719 Effective date: 19880725 |
|
| FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
| FPAY | Fee payment |
Year of fee payment: 4 |
|
| FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
| FPAY | Fee payment |
Year of fee payment: 8 |
|
| REMI | Maintenance fee reminder mailed | ||
| LAPS | Lapse for failure to pay maintenance fees | ||
| STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
| FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20020522 |